The grafana box on the main dashboard needs an additional way to limit the grafana dashboards listed beyond just using a tag.
1. Add a new grafana dashboard list page (in OpenNMS) which can be used to display all available dashboards.
2. Add a new system property to limit the total # of dashboards to display.
3. If there are more dashboards than the limit, add a link "View more at..." that takes the user to the grafana dashboard list page.